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potassium metabisulfite

Inquiry
  Post Date: Aug 14,2014
  Expiry Date: Feb 10,2015
  Detailed Description: Cas No. :16731-55-8

Packaging & Delivery

Packaging Details: 25 kg per bag, composite bag lined with plastic bag, or by user's request.

Specifications

bleacher

Potassium metabisulfite

molecular formula: K2S2O5=222.326
molecular weight: 222.33
CAS Number: 16731-55-8
Product characteristics: The Product was colorless crystal or white crystalline powder with the relative density of 2.34 .The melting point was 150-190oC(decomposition). The product had a flavor of sulfur dioxide and soluble in water with acidic aqueous solution, it was not soluble in ethanol. Sulfur dioxide was released from acidic solution and oxidized to  sulfate  in  the air.

Technical index


Test item

Unit

Specification

K2S2O5

g/100g

98% min

SO2

g/100g

56.0 min

K2S2O3

g/100g

0.1 max

Na

g/100g

2 max

Cl

g/kg

0.5 max

pH-value(10%solution)

-

3.8-4.8

heavy metal(measured by Pb)

mg/kg

10 max

As

mg/kg

1 max

Cu

mg/kg

1 max

Fe

mg/kg

5 max

Hg

mg/kg

0.1 max

Pb

mg/kg

1 max

Se

mg/kg

1 max

Zn

mg/kg

1 max

K2SO3 +K2SO4

mg/kg

excess material

Product usage
the product was used for the preparation of photographic developing solution, which was also used as food bleaching agents, preservatives, antioxidants .In addition, it could be used to retain freshness of wine, fruit juice, beer clarifying agent, fruits and vegetables, meat , grapes, as well as the non-cyanide silver plating.
Product package:
25 kg per bag, composite bag lined with plastic bag, or by user's request.

 

  CAS Registry Number:

16731-55-8
  Synonyms: ;Disulfurous acid,potassium salt (1:2);dipotassium oxidosulfanesulfonate oxide;sulfanesulfonic acid, hydroxy-, oxide, monopotassium salt;
  Molecular Formula: H2KO5S2
  Molecular Weight: 185.2412
  Molecular Structure: 16731-55-8 Potassium metabisulfite

  Company: Anyang Criss chemicals Co,.ltd.     [ China ]        
  Contact: Mr zhang
  Tel: 86-372-5055727
  Fax: 86-372-5055727
  Email: crisschem@hotmail.com
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